Sonny Vaccaro -- the man who famously helped Nike sign Michael Jordan back in the day -- says if he were still in the shoe brand industry ... he could see Victor Wembanyama getting an unprecedented sneaker deal that could include "a blank check."
Wembanyama, a 7-foot-4 center from France, blew the doors off the American basketball world this week ... putting on a clinic in two nationally televised, showcase games in Nevada -- and Vaccaro was left nearly speechless by it all.
Sonny, who's seen all of the top prospects in basketball for decades, tells TMZ Sports he's never seen anything quite like what Victor showed on Tuesday and Thursday.